<template>
  <div class="home-category">
    <!-- 菜单 -->
    <ul class="menu" v-if="catalist.length > 0">
      <!-- 一级 -->
      <li
        v-for="item in catalist"
        :key="item.id"
        @mouseenter="currentId = item.id"
      >
        <RouterLink to="/">{{ item.name }}</RouterLink>
        <!-- 二级 -->
        <template v-if="item.children">
          <RouterLink v-for="sub in item.children" :key="sub.id" to="/">
            {{ sub.name }}
          </RouterLink>
        </template>
      </li>
    </ul>
    <!-- 骨架屏 -->
    <ul class="menu" v-else>
      <li v-for="item in 9" :key="item">
        <XtxSkeleton
          :width="45"
          :height="20"
          bg="gray"
          style="margin-right: 10px"
        />
        <XtxSkeleton :width="120" :height="20" bg="gray" />
      </li>
    </ul>
    <!-- 弹层 -->
    <div class="layer">
      <h4>分类推荐 <small>根据您的购买或浏览记录推荐</small></h4>
      <ul v-if="goodsList">
        <li v-for="good in goodsList" :key="good.id">
          <RouterLink :to="`/goods/${good.id}`">
            <img alt="" v-imgLazy="good.picture" />
            <div class="info">
              <p class="name ellipsis-2">{{ good.name }}</p>
              <p class="desc ellipsis">{{ good.desc }}</p>
              <p class="price"><i>¥</i>{{ good.price }}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import { computed, ref } from 'vue-demi'
import { useStore } from 'vuex'
export default {
  name: 'HomeCategory',
  setup () {
    const store = useStore()
    // 目录
    const catalist = computed(() => {
      return store.state.catagory.catagryList.map(item => {
        return {
          id: item.id,
          name: item.name,
          children: item.children.slice(0, 2)
        }
      })
    })
    // 当前item的id
    const currentId = ref('')
    // 根据当前id获取goods
    const goodsList = computed(() => {
      return store.state.catagory.catagryList.find(item => item.id === currentId.value)?.goods
    })
    return { catalist, currentId, goodsList }
  }
}
</script>

<style scoped lang='less'>
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0, 0, 0, 0.8);
  position: relative;
  z-index: 99;
  .menu {
    li {
      padding-left: 40px;
      height: 55px;
      line-height: 55px;
      &:hover {
        background: @xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }
  // 弹层默认不显示
  .layer {
    width: 990px;
    height: 500px;
    background: rgba(255, 255, 255, 0.8);
    position: absolute;
    left: 250px;
    top: 0;
    display: none;
    padding: 0 15px;
    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;
      small {
        font-size: 16px;
        color: #666;
      }
    }
    ul {
      display: flex;
      flex-wrap: wrap;
      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;
        &:nth-child(3n) {
          margin-right: 0;
        }
        a {
          display: flex;
          width: 100%;
          height: 100%;
          align-items: center;
          padding: 10px;
          &:hover {
            background: #e3f9f4;
          }
          img {
            width: 95px;
            height: 95px;
          }
          .info {
            padding-left: 10px;
            line-height: 24px;
            overflow: hidden;
            .name {
              font-size: 16px;
              color: #666;
            }
            .desc {
              color: #999;
            }
            .price {
              font-size: 22px;
              color: @priceColor;
              i {
                font-size: 16px;
              }
            }
          }
        }
      }
    }
  }
  // 显示弹层
  &:hover {
    .layer {
      display: block;
    }
  }
}
</style>
